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Prusa i2, Prusa i1, Prism, Sells, and other Mendel variants
Re: Opto's, F*%king opto's - 14 years ago
QuoteOpto's, F*%king opto's I have 1 left working out of a dozen. The rest I've replaced with 50 cent micro switches. They work great.by Bruce - Reprappers
Re: DealExtreme Kapton - 14 years ago
Not sure what you're talking about. I bought mine back in May and other than some rips that occur just after cleaning when pieces get stuck to the bed like glue I haven't had any problems with it. I wind my nichrome with it too.by Bruce - General
Re: Pololu A4938 - with or without voltage regulators?? - 14 years ago
We are running standard Pololus on ATX power supplies. They seem to be working fine, straight up on both voltages (no decoupler's). The oldest one has well over 500 Hrs of print time on it. I'd say: Save yourself the money, buy the standard version. Word of caution though: Keep It Cool! Heat sink and fan. Better safe than sorry.by Bruce - Controllers
Re: SAE all-metal hot end, how to taper the melt zone? - 14 years ago
I broke off an 11/64 drill bit, then ground the taper on the end using a bench grinder by turning the bit slowly in a hand drill against the side of the wheel to get the overall shape. I then had to regrind the flute tip and land profiles with a mini grinder to make it cut.... What a pain Not sure how it would manage drilling any distance through stainless. I only drill the full diameter of thby Bruce - General
Re: Driving a mix of G3 and pololu steppers from G3 motherboard - 14 years ago
QuoteHas anyone succesfully achieved this? (I am sure there must be) Yes we have and this is what we did Ok...... the machine on this thread uses a techzone motherboard with Pololu boards set to 1/16 step for X&Y, 1/2 step Pololu board for the extruder, techzone stepper for Z, and a Makerbot extruder board. Microstepping with Pololu stepper boards on a Gen 3 motherboard We have anotherby Bruce - Controllers
Re: Isaac Mendel build - 14 years ago
QuoteI'm going to figure out if maybe I should start putting more objects on the build tray before sending the gcodes to file in the future. No need to figure. More parts on the tray definitely works better. Less down time, and less chance of overheating small parts. As you can see by the pic that I took with my $139.00 Canon PowerShot. My parts aren't “absolutely perfect”.But they are veryby Bruce - Reprappers
Re: [DE] Mendel reprapped parts wanted (+adrian's geared extruder) - 14 years ago
Hi Marius. I don't know much about Laser cut, but if you're interested we have sets 1 each of blue and black in ABS, and 1 in natural PLA with black ABS extruder, X and Y carriage parts. We sell our printed sets for 250 US that's currently about 178 EUR. Not sure what the shipping would cost from Canada?by Bruce - Wanted
Re: Microstepping with Pololu stepper boards on a Gen 3 motherboard - 14 years ago
Jeremy made up several of these boards and that's what we are using. We only micro step X and Y. You don't really need to for Z or the extruder. Decoupling caps. We don't use them.by Bruce - Reprappers
Re: reversing stepper motor (Oozebane) - 14 years ago
This is the setting that we use The video shows how it works http://forums.reprap.org/read.php?4,64933by Bruce - General
Re: reversing stepper motor (Oozebane) - 14 years ago
Hi Nuri The Skeingorge setting for reversing the extruder motor is in dimension. There is a brief description here. Skeinforge Dimensionby Bruce - General
Re: Microstepping with Pololu stepper boards on a Gen 3 motherboard - 14 years ago
Nudel, let me know how you make out. We're just finishing up a set of PLA parts to try it out ourselves. You can play Guinea pig instead. I should probably post it as a tweak in the Mendel forum....... If it works OK with PLA. OK.... Wade: I assembled the black one completely according to spec, then to minimize the wobble I loosened all the inside nuts on the top threaded rods a turn and then tby Bruce - Reprappers
Re: Microstepping with Pololu stepper boards on a Gen 3 motherboard - 14 years ago
Hi Nudel You can't tell from the video and it's not really obvious in the picture below, but the frame is a trapezoid...... or trapezium, depending on where you live . Just to avoid confusion, there are three of us working on this. We canted the frame sides in at the top, !/2” on both and away went the wobble. That's all, nothing more. Just to note: ABS is forgiving, not sure how PLA would reactby Bruce - Reprappers
Re: knurling knowledge kneeded - 14 years ago
I had so many problems with soft ABS slipping, shredding and clogging those little teeth. I got frustrated and started experimenting with larger taps. I ended up using a 5/16-18 three flute. I haven't had a problem with slipping since. I also reversed the bolt in the housing to center the track better on the shank. I press a nut into the gear and lock it into the threads with jamb nuts on both siby Bruce - General
Re: RepRap sucks -- it's the worst of all 3D printers - 14 years ago
I must have missed the point right from the get go. I thought that Reprap was a project not a product. And here I thought that Mendel was a step in the evolution of this project. How can you compare it that way. It doesn't cater to it's customers because it doesn't have customers. It's just a growing group people from all over the globe trying to leave their little mark on it. Whether it's a majoby Bruce - General
Re: Mendel RP parts in TO - 14 years ago
Bruce falls from chair in a fit of hysterical laughter. Hits the floor... OUCH!!!! Just kidding. Anything major? How about everything major? Most notably, a crooked frame, can't figure how that even happened. A broken pulley, broken belt, exploding chip, a stepper motor physically losing its steps, didn't know that could happen either. Not trying to deter, just passing on some of our experienceby Bruce - Canada, Toronto RepRap User Group
Re: Mendel RP parts in TO - 14 years ago
Hi Mike, We are just finishing up a set in St. Catharines if you're interested. It's in black ABS, the first complete set printed on our Mendel. The parts look really nice. Not sure about the user group, I'm pretty new myself. We have our own little group of three here. If you have any other questions feel free to ask. Bruceby Bruce - Canada, Toronto RepRap User Group
Re: ??!!!?? ARGH Crooked prints 
- 14 years ago
I'm an idiot.... I'd call it a comedy of errors except it wasn't funny. I sat down on Saturday and read your responses and this is what I wrote Thanks for the responses folks John: I wish congrats was not in order. I have a couple of anxious people waiting for parts. After the first part came off the Mendel... (barring the problem) the prints are so nice that I just don't want to print any moby Bruce - General
??!!!?? ARGH Crooked prints - 14 years ago
I don't get it. Parts are printing out of square. We printed out a paper grid and jogged all the way around and through it. It followed the grid perfectly. Then print a part..... !@#$% CROOKED. Print the same parts using the same stl's on Cupcake and they come out..... SQUARE!!!! Drooly, but square. A little frustrated. We printed at 30mm/s and at 55mm/s and got the same result. Any heby Bruce - General
Re: If I had.... (a daydream) - 14 years ago
AgeingHippy Wrote: ------------------------------------------------------- > a daydream > > If I had a well equipped workspace, an operating > reprap and buckets of energy I would experiment > with a nozzle of brass which attaches to a metal > which is a poor heat conductor. The metal with the > higher expansion coef screwing into the other.. > but anyway, why not just heby Bruce - General